МЕХАНІЗМ УТВОРЕННЯ МІКРОРЕЛЬЄФУ РОБОЧОЇ ПОВЕРХНІ ХОНІВ В ПРОЦЕСІ ХОНІНГУВАННЯ
The article presents the results of the study of the mechanism of interaction of grains of hon with a bound abrasive with the treated surface of cylinders of internal combustion engines (ICE). It is indicated that in order to simulate the process of grinding SiC grains with a grain size of 160/125,...
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| Datum: | 2024 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | Ukrainian |
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Институт сверхтвердых материалов им. В. Н. Бакуля Национальной академии наук Украины
2024
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| Online Zugang: | http://altis-ism.org.ua/index.php/ALTIS/article/view/360 |
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| Назва журналу: | Tooling materials science |
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Tooling materials science| Zusammenfassung: | The article presents the results of the study of the mechanism of interaction of grains of hon with a bound abrasive with the treated surface of cylinders of internal combustion engines (ICE).
It is indicated that in order to simulate the process of grinding SiC grains with a grain size of 160/125, their fine grinding was carried out on a laboratory planetary mill M-44L, which, according to domestic and foreign research, is widely used when grinding materials that are difficult to grind, for example, carbides, synthetic diamonds, etc.
It is noted that in order to evaluate the characteristics of SiC grain destruction on the working surface of the grain, a Carl Zeiss EVO50XVO scanning electron microscope with an X-ray energy dispersive analyzer was used. Characteristic signs of destruction of the whole K3(SiC) grain before and after honing were determined.
The characteristics of the fracture of SiC particles with the formation of small sharp cutting edges are also presented.
It has been proven that such particles have high hardness and cutting properties. During the interaction of the grains with the honing surface of the cylinders, a surface is formed, which contributes to the increase of oil resistance and the bearing area with a high quality of the surface structure. The final honing is carried out on an organic bond with SiC grain size M40. Since all the load related to the effective removal of the allowance and improvement (correction) of the shape of the inner surface of the cylinder is taken by the hone, which, first of all, contains short-circuiting with a grain of 160/125. In addition, the unique composition of the bakelite bond is optimized taking into account rational honing modes.
The effectiveness of the preliminary basic honing is considered in view of the removal of the allowance, as well as the optimization of processing modes with the necessary high-quality composition of abrasive hones.
The mechanism of interaction of silicon carbide grains located in the working surface of the hones with the processed surface of the cylinders was analyzed.
It is indicated that the results of the study can be used to analyze the efficiency of hones in the creation of basic and final honing processes. |
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